Change Tracking:
- Track modifications to URL, method, body, syntax, and headers
- Show • indicator on modified tab labels
- Real-time update of tab state on any change
- Each tab independently tracks its modification state
Unsaved Change Warnings:
- Warn when closing tabs with unsaved changes
- Warn when closing application with any unsaved tabs
- Destructive action styling for close confirmations
- Smart messages: single tab vs multiple tabs
Smart Tab Loading:
- Detect empty "New Request" tabs (no URL, body, or headers)
- Replace empty tabs when loading from sidebar/history
- Create new tab when current tab has changes
- Seamless workflow without unnecessary tabs
Application Close Protection:
- Prevent accidental data loss on app close
- Check all tabs for unsaved changes
- Show confirmation dialog before closing
- Works with all close methods (X, Alt+F4, Quit)
Bug Fixes:
- Fix signal handler to accept variable arguments
- Proper handling of notify::selected signals
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